/*
 * ==========================================================================================
 * =                   JAHIA'S DUAL LICENSING - IMPORTANT INFORMATION                       =
 * ==========================================================================================
 *
 *                                 http://www.jahia.com
 *
 *     Copyright (C) 2002-2025 Jahia Solutions Group SA. All rights reserved.
 *
 *     THIS FILE IS AVAILABLE UNDER TWO DIFFERENT LICENSES:
 *     1/Apache2 OR 2/JSEL
 *
 *     1/ Apache2
 *     ==================================================================================
 *
 *     Copyright (C) 2002-2025 Jahia Solutions Group SA. All rights reserved.
 *
 *     Licensed under the Apache License, Version 2.0 (the "License");
 *     you may not use this file except in compliance with the License.
 *     You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *     Unless required by applicable law or agreed to in writing, software
 *     distributed under the License is distributed on an "AS IS" BASIS,
 *     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *     See the License for the specific language governing permissions and
 *     limitations under the License.
 *
 *
 *     2/ JSEL - Commercial and Supported Versions of the program
 *     ===================================================================================
 *
 *     IF YOU DECIDE TO CHOOSE THE JSEL LICENSE, YOU MUST COMPLY WITH THE FOLLOWING TERMS:
 *
 *     Alternatively, commercial and supported versions of the program - also known as
 *     Enterprise Distributions - must be used in accordance with the terms and conditions
 *     contained in a separate written agreement between you and Jahia Solutions Group SA.
 *
 *     If you are unsure which license is appropriate for your use,
 *     please contact the sales department at sales@jahia.com.
 */
package org.jahia.services.render.webflow;

import org.jahia.osgi.BundleUtils;
import org.springframework.util.ObjectUtils;
import org.springframework.util.StringUtils;
import org.springframework.webflow.execution.FlowExecutionException;
import org.springframework.webflow.validation.BeanValidationHintResolver;

import java.util.ArrayList;
import java.util.List;

public class JahiaBeanValidationHintResolver extends BeanValidationHintResolver {

    public Class<?>[] resolveValidationHints(Object model, String flowId, String stateId, String[] hints) throws FlowExecutionException {

        if (ObjectUtils.isEmpty(hints)) {
            return null;
        }

        List<Class<?>> result = new ArrayList<>();
        for (String hint : hints) {
            if (hint.equalsIgnoreCase("Default")) {
                hint = "javax.validation.groups.Default";
            }
            Class<?> resolvedHint = toClass(hint);
            if ((resolvedHint == null) && (model != null)) {
                resolvedHint = findInnerClass(model.getClass(), StringUtils.capitalize(hint));
            }
            if (resolvedHint == null) {
                resolvedHint = handleUnresolvedHint(model, flowId, stateId, hint);
            }
            if (resolvedHint != null) {
                result.add(resolvedHint);
            }
        }

        return result.toArray(new Class<?>[result.size()]);
    }

    private Class<?> toClass(String hint) {
        try {
            return BundleUtils.loadModuleClass(hint);
        } catch (ClassNotFoundException e) {
            // Ignore
        }
        return null;
    }

    private Class<?> findInnerClass(Class<?> targetClass, String hint) {
        try {
            return BundleUtils.loadModuleClass(targetClass.getName() + "$" + hint);
        } catch (ClassNotFoundException e) {
            Class<?> superClass = targetClass.getSuperclass();
            if (superClass != null) {
                return findInnerClass(superClass, hint);
            }
        }
        return null;
    }
}
